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June 5, 1923. 1,457,476

HA H. vlcKERs COMPUTING MACHINE Filed March 5, 1921 MWI/@Mm ?atented June 5, 1923.

UNITED STATES PATENT OFFICE.

HARRY H. VICKERS, OF CORONA, NEW YORK, ASSIGNOR `T0 UNDERWOOD COMPUTING MACHINE COMPANY, 0F NEW YORK, N. Y., CORPORATION OF NEW YORK.

COMPUTING MACHINE.

Application med March s, 1921.- seriai No. 449,641.

To all whom t may concern:

Be it known that I, HARRY H. ViCKERs, a citizen of the United States, residing in Corona, Long Island, in the county of Queens and State of New York, have invented certain new and useful Improvements in Computing` Machines, of which the following is a. specification.

This invention relates to computing macliines` and more particularly to motordriven machines having registers with different numbers of number or dial-wheels, and automatic means for tripping the motor so as to compute, in any of the re isters, a number as soon'as it has been comp etely indexed.

As herein disclosed the invention is applied to a machine of the Underwood-Hanson type, which is provided with three registers. two of which are adapted for'computinc in decimal monetary systems, and the other. preferably of greater capacity, for computing in the English or sterling system. 0f the registers for computing in decimal monetary systems, one may be used for American money and one for Italian money. Selective operation of the denomination-selecting means for the different registers may be obtained by providing sets of jacks, one for each register, the forward ends of the jacks in the different sets being arranged in cchclon, that is, at different distances from front to back, as well as spaced across the machine, thus enablin the jacks of any one set to be selected by pacing on the carriage a selector having a dog properly positioned thereon to actuate the jacks of the set desired.

Preferably the figures in the different systems are typed in the saine columnar position but on different sheets, one for each monetary system. After determining the positions at which the different denominationselcctors must be set on the carriage, so that denomination selecting in every case will begin when the carriage reaches a certain letter-space position, the positions of the selectors may be marked by any suitable means, such as collars, on one of the rods on which the selectors are supported, one on each side of each selector, so that in case it is desired to putl one of the selectors on the carriage, its position will be determined by means of the corresponding collars. Preferably the denomination-Selectors and one of the rods are so constructed that while the selectors are normally held on the rod, they may be removed therefrom when swung about the same to a suitable position, and the collars are constructed to enable removal in substantially the same manner, but are provided with means to hold them againstrotation on the rod and to prevent movement along the latter.

Inasmuch as the computing zones for all of the registers begin at the same letterspace position of the carriage, a single tabun lator stop suitably positioned on the carriage may be used in tabulating for all of the registers. As herein disclosed provision is made of ten tabulator keys, and the sterling register has eleven number-Wheels. The tabulator keys running from left to right are marked lv cclod, als, 4410s, 153, 10,77 H100 7! Ul H U10!! a,nd (t100 H T T T spectively. The register for American money has, however, only nine numbers wheels, and therefore the corresponding markings begin on the third tabulator key from the left, the third and fourth keys being marked lc and 1095, respectively, the numbers on the other keys to the right servin for dollars as well as for pounds ster ing in the English system.

referably no markings are used for the register in which Italian money is computed, since the Italian monetary system is a decimal system and use can be made of the same tabulator keys as for the register in which American money is computed. Itwill be seen that no rovision is made for tabulating to the position corresponding to the computing wheel of highest denomination in each register.

The tabulator stop may be utilized to actuate the motor trip when indexing of a number to be computed in any one of the registers has been completed. If the same portion of the tabulator stop which co-operates with the counter-stop is utilized to actuate the motor trip, such actuation must be timed to take effect after passing through a computing zone corresponding to the register of greatest capacity, and therefore the motor will not be tripped by that portion of the tabulator stop immediately after completing the indexing for the registers of smaller capacity. This undesirable condition is obviated, according to the present neffective position, the motor trip will be actuated immediately upon passage ot the carriage out ot' a computin zone corresponding to the registers of smal er capacity.

It will be seen that the machine can be set,

conveniently and quickly, for use with'any* one of the registers, the only steps necessary being to place a suitable denomination-se lector on the carriage in a position indicated by the corres onding collars, removing or setting in inei ective position any other selector which may be on the carriage, and

placing the movable member on the combined tabulator stop and motor-trip actuator in eiiective position it the computation is to be eected in one of the registers of less capacity, or in ineffective position in case a register ot greater capacity 1s to be used.

Although computation in American money or italian money may be performed in either decimal register, it is desirable to have one for use in computing American money only and the other t'or computing lltalian money.

@ther ieatures and advantages will hereinatter appear.

ln the accompanying drawings,

Figure 1 is a fragmentary view, looking from above, or" my invention applied to so much ot an Underwood-Hanson machine as is necessary for the purpose of illustration.

llligure 2 isa sectional side view of a part ot the structure shown in Figure 1, showin a denomination-selector and the-combine tabulator stop and motor-trip actuator.

Figure 3 is a sectional side view on a larger scale ot some ot the parts shown in lligure 2.

Figure l is a front view of the parts shown in Figure 3.

Figure 5 is a perspective view of a collar used in positioning a denomination-selector.

lln the Underwood-Hanson machine to which the invention is applied, provision is made ot three registers, 10, 11 and 12 arranged in order from left to right, registers 10 and 11 each having nine number-Wheels 13, and register 12 having eleven numberwheels. The mechanism for controlling the action oit the number-wheels or dials in the registers comprises jacks 14 arranged in three groups, or sets, 15, 16 and 17, each group or set having denominational jacks corresponding to the number-wheels in the corresponding register and also one for each punctuation space. ln each set, the forward ends ot the jacks are arranged in a line transverse ot the machine, and these lines naam-re are at different distances from the front of the machine, the forward ends of the jacks in the set 15 extending farthest to the trout, those in the set 1G lying farther to the rear, and those of the set 17 lying still farther to the rear. As shown in Figure 1, the torward ends of the jacks of the set 1G are broken away to show the underlying structure. ln order to actuate the jacks, provision is made of denomination-erlectors 1&5 which may be set at letter-space intervals ou a typewriter carriage 19, so as to actuate the jacks of the different sets seriatiin in the letter-space movement of the carriage.

The denomination-selectors 18 are pivotally `and slidably mounted on a rod 2f.) supported by the carriage, and may be held in different letter-space positions on the carriage by means of meth, one on each of the selector-dogs, adapted to enter notches at letter-space positions in a rod 21 on the carriage. Due to the varying positions of the forward ends or the jacks of the different sets, the selector-dogs 22 must be set at ditferent positions from iront to rear on the selectors 18, in accordance with the sets ol jacks to be operated thereby. For example, 'the selector shown to the right has its dog 22 in alignment with the forward ends of the jaclrs of set 17, and therefore will actuatc the same when carried therepast, but will be ineffective to actuate the other sets of jacks.

The arrangement of the jacks of the ditferent sets and of the selector-dogs for operating the same is similar to that of' the corresponding elements in the patent to Frederick A. Aart, No. 1,270,411, granted June 25, 1918.

Upon movement of the carriage 19 into a computing zone determined by a selector 18, a truste-conical roller 23 on the latter will ride up the tapered end oit a roller or zonecontroller 24 rotatably mounted in arms 25 fixed on a shaft 26. ln this manner, the selector 18 will be lifted into position, so that the selector-dog 22 thereon will actuatc the acks of the corresponding set seriatiin. Certain of the jacks in each set serve to select the denominations in which the digits are to be indexed, and others may serve to control punctuation-locking devices, not shown, which prevent the depression of any ot the numeral-keys 27 when the carriage is positioned in a letter-space reserved for punctuation.

Depression of any of the numeral-keys 27 having significant digits thereon, while any one oi' the denominational jacks is in actuated position, will cause the corresponding digit to be indexed in the denomination selected, and, upon actuation of the general operator (not shown), the digit so indexed will be run into the corresponding totalizer. 'lhe computing mechanism for the registers 10 and 11, in Which the computations in Ulli lfill decimal systems are to beeffected, may be substantially the same as that disclosed in said Hart patent, No. 1,270,411, and the computing mechanism for the register 12, intended for computation in the sterling system, may be of the saine general type as that disclosed in the patent to lVilliam L. (lumpreclit, No. 1,338,012` dated April 27, 1920. For reasons to be brought out more fully hereinafter, no provision is made for computing farthings.

In machines of this kind, it is frequently desirable to tabulate the carriage to different denominational positions in the computing zones. To this end, provision is made ot ten tabulator keys 28, which, acting through suitable means (not shown), may raise suitable slides or stop-s 29 into position to engage a tabulator stop 30 settable at letterspace distances on a rack 3l mounted on the carriage. For convenience in tabulating with respect to the register Jfor sterling money, the tabulator keys are provided with indications from left to right of 1d,

1()d`77 461s, 10s, 461,9, 10,73 10023 r1 1i n10 n H100 ,y T, T and T and for convenience in using the tabulator keys in connection with register for computing according to the United States monetary system, the third and fourth tabulator keys are provided with indications, 1 and 10, the keys for dollars, tens of dollars, hundreds of dollars, ctc.. being respectively the same at those s used for 1, 10, 100.3, etc. No additional indications on the tabulator keys are required for use with the register 11 for comput-ing in Italian money, the third key from the left corresponding to one centesimo as well as to one cent, the fourth key to ten centesimi, the fifth key to a lira, the sixth to ten lire, etc.

It will be evident that, when certain tabulator keys are provided with indications for certain denominations in either dollars or pounds sterling` provision of computing mechanism for farthings would require the usc of tivo additional tabulator keys or would reduce the number of keys which might have the same indications for all three systems.

After indexing the digits' of a number to be computed, the number may be run into the proper register by means of the general operator, which may be actuated automatically in substantially the same Way as in the patent to Frederick A. Hart, No. 1.296,953, dated March 11, 1919. For this purpose, the right-hand plate of the tabulator stop30 (Figure 4) may be of sufficient length to engage and actuate the motor-trip lever 32. y

Inasmuchv as the first tWo Wheels at the right of the register 12 are used in computing pence, the third and fourth to compute shillings, the remainder to compute pounds,

and the punctuation jacks'of the Set 17 are correspondingly positioned, it will be necessary to arrange the tabulator stops 29 in groups, as indicated in Figure 1. This grouping may be effected by providing slot-s 33 in corresponding groups in a bracket 34 at the rear of the machine, or by providing a series of slots at letter-space intervals, placing stops 29 in the slots corresponding to the positions of the number-wheels and omitting such stops in the slots corresponding to punctuation spaces. tabulation for Wheels in the higher denominations of the different registers Will be effected in the same manner', and that, if the plate 30n of the tabulator stop 3() actuates the motor-trip lever 32 as soon as the carriage passes out of the computing zone for the register 12, the tripping of the motor will not occure immediately upon passing out. of a computing zone corresponding to either of the registers 10 and 11, and it vvill be evident, from the arrangement ot the tabulator stops 29, that for the registers 10 and 11, such tripping of the motor will not occur until the carriage has been fed through three letter-spaces beyond the end of the computing zone.

According to the present invention, the tabulator stop 30 is provided With means whereby the motor-trip may be actuated when the carriage reaches a letter-space position three steps to the right of that in Which the motor-trip lever will be actuated by the plate 30a. To this end, provision is made of a plate or slide 35 slidably supported on the left-hand plate 36 of the stop 30 by means of shouldered screws 37 and 38, the first passing through a slot 39 in said plate 35 and being threaded into the plate 36 of' the tabulator stop` and the other screw 38 being passed through an open-ended slot 40 in the slide and threaded into the plate 36. Provision may also be made of a narnovv slot 41 forming an extension of the slot L 10 to render the parts at the side of said slot more flexible, the slot 40 being of such Width that the parts of the slide 35 on each side thereof will exert a pressure against the shouldered screw 38, and tend to hold the slide 35 in any position in which it may be placed on plate 36. By means of a bent portion 42, which may serve as a handle, the plate 35 may be moved downwardly and to the rear to bring a lug 43 thereon from an ineffective position. shown in Figure 3, to an effective position. as shown in Figure 2, in which, upon movement of the carriage out of the computing zone, it will be effective to actuate the motor-trip lever 32. It Will be evident that, due to the inclination of the line determined by the screws 37 and 38, the upward pressure exerted by the motor-trip lever 32 against the lug 43 Will act along -a line inclined at a considerable angle to the It will be seen that the direction of movement of plate 35 determined by the screws 37 and 38, and that, consequently, the frictional engagement of the parts of the plate 35 at the side of slot 40 with the screw 38 will be suflicient to prevent movement of the plate 35, due to upward pressure 0n the lug 43. It will also be evident that, since the third tabulator stop 29 is three letter-spaces to the right of the first tabulator stop, the plate 35 must be supported at a distance of three letter-spaces from the plate 30a. v

Usually, the figures are typed in the same columnar position on the work-sheets, but different sheets are used for the different kinds of computation. When this is the case, a single tabulator stop 30 may be utilized, for tabulating, for all of the registers, and it will then be necessary to determine the proper letter-space positions for the denomination-selectors 18 which co-operate with the sets of jacks corresponding to the three registers. If selectors 18 were in effective position for all of the registers at the same time, actuation of the numeral-keys 27 would cause numbers to be indexed in the computing mechanisms of all of the registers. As previouly stated, however, it is usually desired to compute in only one register at a time, and to get this result the selectors 18 for the two registers not in use may be swung about the rod 2() to ineffective position or may be removed entirely therefrom. To enable such removal, each selector 18 is constructed so as to only partially encircle the rod 20, and the rod is cut away at 44, so that the selector, when turned to a sufficient extent in clockwise direction (Figure 2) about the rod, may be withdrawn therefrom. When a selector 18 is made ineffective by removing it from the rod 20, some care must be exercised in restoring it to the same position when it is desired to actuate the corresponding register, and even in case the selector is merely turned to ineffective position on the rod 21, the tooth which enters a notch in the rod 21 will be withdrawn therefrom, thus enabling the selector 18 to be readily displaced along the rod 20.

In order to insure the proper positioning of the various selectors 18, provision may be made of suitable means, such as collars 45, which may be secured to the rod 20, so as to maintain the selectors 18 in proper position longitudinally of the rod 20 when swung to ineffective position, and also to assist in properly positioning a selector 18 which had been removed from the rod 20. Preferably, these collars 45 do not extend completely around the rod 20, and if turned to bring the end of one of the portionsv extending around the rod into a cut-away portion 44 of the rdd, the collar may be removed in the same manner as the selectors 18. In order to hold e collar 45 on the rod 20, when effectively positioned, .as shown in Figure 2, a screw 46 may be Ythreaded therethrough in position to engage the rod 2 0, and thereby prevent turning of the collar 45 to a position for removal.

Ordinarily, in preparing the machine for use, the single tabulator stop 3() will be properly positioned on the rack 31, and the collars 45 will be positioned along the rod 20, so that any one of the selectors 18, when properly positioned by its collars, will be effective for denomination selecting at the point determined by the tabulating mechanism. If then it is desired to compute in any particular register, the proper selector 18 is set in the position determined by the corresponding pair of collars 45, and the selectors 18 for the other register are rendered ineffective, if not already in such condition. Tabulating may then be effected to 'position the carriage for computation on :inv selected wheel in the register in which computation is to be effected. Upon completion of such tabulation, the number to be computed may be indexed by the proper numeral-keys 27, the carriage 19 being fed forward step by step during such actuation. If the computation is to be effected in register 12, the plate or slide 35 will be set in ineffective position, as shown in Figure 3, and, upon movement out of the computing zone, the motor-trip lever 32 will be actuated by the plate 30a. When, however, a computation is being effected in either of the other registers, the plate 35 will be set in operative position, as shown in Figure 2, and lug 43 will be effective to engage the motor-trip lever 32 as the carriage passes out of the computing zone, and trip the motor at that time instead of at a later time whenvthe carriage has passed through three letter-space distances to bring the plate 30a into engagement with the lever 32.

It will be evident that in changing from computation in one register to another, it will be necessary only to see that the proper selector 18 is in effective position, the others being in ineffective positions, and that the lug 43 on the plate 35 is suitably positioned.

For convenience in reading the results from the registers, provision may be made of fingers 47 extending across the sight openings 48 at proper intervals to indicate punctuation.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, l claim:

1. A combined tabulator stop and motortrip actuator, comprising a fixed portion to actuate a motor trip and a member shiftable to and from effective position and spaced at a plurality of denominational distances from said xed portion, so that when said memlll sov

ber is in effective position it will actuate the motor-trip actuator before it can be actuated by the fixed ortion.

2. A com ined carriage tabulator sto and motor-trip actuator, comprising a fixe portion to actuate a motor-trip and means whereb the motor trip may be actuated when t e carriage reaches a denominational position before that at which the fixed portion becomes effective.

3. A tabulator stop for use in a combined typewriting and computing machine having a motorl trip, comprising a member shiftable on said stop to and from effective position relative to said motor trip and a second member to actuate said motor trip when the first member is in ineffective position.

4. In a combined typewriting and computing machine, in combination, a carriage y which computin zones are determined, a tabulator stop setta le at letter-space intervals on said carriage, a motor tri actuable by said tabulator stop, and setta le means intermediate said stop and said motor trip for varying, without changing the setting of the stop, the letter-space positions of the carriage at which the motor trip will be actuated.

5. A combined tabulator stop and motortrip actuator, comprising a body portion adapted to co-operate with a counter-stop and also to actuate a motor trip, and a motor-trip-actuating member slidable on said body in a direction inclined to that in which it acts on the motor tri ,so that the pressure necessary to actuate t e latter will not act directly to force the slidable member to ineffective position.

6. In a computing machine in which numbers are indexed digit Joy digit and then computed, in combination, a traveling carriage, two registers having different numbers of number-Wheels, denomination-selecting devices, means whereby the carriage may control the selecting devices for either of said registers when the carriage passes through a certain columnar position, a motor trip, and a device for actuating the motor trip settable along said carriage, said motortrip-actuating device being provided with shiftable means to determine the motor-trip actuation in accordance with the number of number-wheels in either of said registers.

7. In a computing machine in which numbers are indexed digit by digit and then computed, in combination, a traveling carriage, registers having different numbers of number-wheels, a motor trip, carriage-controlled means to determine computing zones of different widths corresponding to said registers, the positions of the carriage being the same for the highest denominations of said registers and consequently different for the lowest denominations, and a device adapted when in a fixed position longitudinally of the carriage to be set to actuate the motor trip when the carriage passes out of any one of said computing zones.

8. In combination, a register in which computations in a decimal monetary-system are to be recorded, a register in Whlch computat1ons in the sterling monetary system are to be computed, the last-mentioned register havlng more number-Wheels than the other, a traveling carriage by which denomination selecting is controlled, tabulator keys having markings according to both systems, said markings running from left to right and bemg started on such keys at the left of the series that the marking corresponding to the number-Wheel of highest denomination, 1nI either register, with respect to which tabulatlon is to be effected, will appear on the right-hand key, a tabulator stop on said carriage, counter-stops corresponding to the tabulator keys, a motor trip, a fixed member on said tabulator stop-by means of which the motor trip may be actuated when the carriage passes out of the computing zone corresponding to the register having the greater number of number-wheels, and a member shiftable to and from eective position 1n which it may actuate the motor trip as the carrlage passes out of the computing zone corresponding to the other register.

9. In a computing machine in which numbers are indexed digit by digit and then computed by motor mechanism, in combination, a traveling carriage by which denomination selecting is controlled, a motor-trip device, a series of tabulator stops arranged in denominational positions, and a combined tabulator stop and motor-trip actuator settable at denominational intervals on said carriage and adapted to co-operate with the stops of said series, said combined tabulator stop and motor-trip actuator being provided with means to vary its action on the motortrip-device without changing its action for tabulating urposes.

l0. A tabulator stop for use in a combined type-writing and computing machine having a motor trip, comprising a body settable at letter-space intervals along the carriage, pins fixed on said body and an actuator for said trip mounted on said ins, said actuator having a slot through w ich one of said pins extends, and an open-ended slot to receive the other pin, said actuator being also provided with a narrow slot forming an extension of the open-ended slot, to render the parts at the sides of the open-ended slot more flexible, to enable them to be Jforced apart to receive the secn ond-mentioned pin, and to exert sufficientpressure thereagainst to hold the actuator in either an ineffective or an effective position, and vice versa, the posit-ion of the slots and pins being such that the movement of the actuator to and from its effective position will be. along a line inclined to that along which the pressure to actuate the trip is exerted.

11. In a combined typewriting and computing machine, registers having different numbers of number-wheels, and tabulating mechanism including tabulator keys sufficient in number to tabulate for the register having the greatest number of numberwheels, the tabulator keys having thereon markings corresponding to number-wheels of the different registers, the markings for the register of the greatest capacity beginning on the left-hand tabulating key, and the markings for a. register of less capacity beginning on a tabulator key, spaced from the first tabulator key to the left, in accordance with the difference between the numbers of number-wheels in the two registers.

12. In a computing machine, in combination, a substantially cylindrical rod, a denominational selector so sha ed as to extend artially around the rod without complete- Fy encircling the same, said rod having a longitudinal groove such that, upon swinging said selector to a position with reference to the groove, it may be placed on or withdrawn from the rod, and means to prevent longitudinal movement of said selector along said rod, comprising a collar shaped to embrace said rod and extending partly around the same, so that it may when turned to a suitable position, with reference to the groove in the rod, be placed thereon or removed therefrom, and means to hold said collar in position on said rod to prevent turning of the collar to a position permitting removal and to prevent movement of the collar along the rod.

13. In a combined typewriting and computing machine, in combination, computing mechanism including two registers in which computations are to be effected according to a decimal system and a. non-decimal system, respectively, tabulating mechanism whereby tabulating may be effected for both registers with provision for punctuation spacing, said tabulating mechanism comprising tabulator keys, certain of which may be used in connection with both registers, and a tabulator stop on the carriage for use with both registers, a motor trip to determine when numbers are to be run into the registers, and motor-trip-actuating means on said stop, the action of which may be varied in accordance with the register in use.

14. In a combined typewriting and computing machine, in combination, a carriage movable step by step to different letter-'space positions, computing mechanism including two registers -of different capacities, carriage-controlled means for determining computing zones in accordance with the caplacities ot said registers, tabulating means aving parts common to the number elements of the register of smaller capacity and to the same number of number elements of the higher denomination in the other register, and a tabulator stop settable at letter-space intervals on said carriage, a motor trip to control the running into the registers of numbers to be computed, and adjustable means whereby actuation of the motor trip by the stop may be effected at different letter-space positions of the carriage without changing the setting of the stop on the carriage.

15. In a combined typewriting and computing machine, in combination, computin mechanism including two registers in whic computations are to be effected according to a decimal system and a non-decimal system, respectively, tabulating mechanism whereby tabulating may be effected for both registers with provision for punctuation spacing, said tabulating mechanism comprising tabulator keys, certain of which may be used in connection with both registers, and a tabulator stop on the carriage for use with both registers, a motor trip to determine when numbers are to be run into the registers, and motor-trip-actuating means intermediate said stop and said motor trip for varying the action of said stop on said motor trip in accordance with the register 1n use.

16. In a combined typewriting and com-.

puting machine, in combination, computing mechanism including two registers in which computations are to be effected according to a decimal system and a non-decimal system, respectively, a carriage determining computing zones, and mechanism for tabulating the carriage for both registers, said tabulating mechanism comprising a single stop on the carriage in the same position for both registers, and tabulator keys, certain of which have indications thereon for denominations of both registers.

17. In a computing machine, in combination, a substantially cylindrical rod, a denominational selector slidable on and rotatable about said rod, said rod having a longitudinal groove such that, upon swinging said selector to a position with reference to the groove, it may be placed on or withdrawn from the rod, andmeans to prevent longitudinal movement of said selector along said rod, comprising a collar shaped to embrace said rod and extending partly around the same, so that it may, when turned to a suitable position, with reference to the groove in the rod, be placed thereon or removed therefrom, and means to hold said collar in position on said rod to prevent turning of the collar to a position permitting removal and to prevent movement of the collar along the rod.

18. In a computing machine, in combination, a substantially cylindrical rod, a denomlnational selector so sha ed as to eXtend partially around the rod Wit out completely encircling the same, said rod having a`longitudinal groove such that, upon swinging said selector to a position with reference to the groove, it may be placed on or Withdrawn from the rod, and means to prevent longitudinal movement of said selector along said rod, comprising collars on opposite sides of the selector, one of said collars being shaped to embrace said rod and extending partly around the same, so that it may, when turned to a suitable position, With reference to the groove in the rod, be placed thereon or removed therefrom, and means to hold said collar in position on said rod to prevent turning of the collar to a position permitting removal and to prevent movement of the collar along the rod.

19. A combined tabulator stop and motortrip actuator, comprising a body to cooperate with a counter-stop, and a motortrip-actuating member slidable on said body in a direction inclined to that in Which it acts on the motor trip, so that the pressure necessary to actuate the latter Will not act directly to force the slidable member to ineffective position.

20. A combined tabulator stop and computation controller for use in a machine comprising combined typevvriting and computing mechanism, said combined stop and controller comprising a body to (zo-operate n ith a counter-stop, and a computation-controlling member slidable on said body in a direction inclined to that in which it acts on the computing mechanism, so that the pressure necessary to actuate the latter Will not act directly to force the slidable member to ineffective position.

21. Atabulator stop for use in a combined typewriting and computing machine having a motor trip, said stop comprising a body settable at letter-space intervals along the carriage, a motor-trip actuator reciprocable on said body to and from effective position, means to guide said actuator so that its reoiprocation is along a line inclined to that along which the pressure to actuate the trip is exerted, and means to detain said reciprocable actuator in effective or ineffective position.

HARRY H. vioKERs,

Witnesses:

EDITH B. LIBBEY, JENNIE P.- THoRNn. 

